1 /* 2 * QEMU disk image utility 3 * 4 * Copyright (c) 2003-2008 Fabrice Bellard 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * of this software and associated documentation files (the "Software"), to deal 8 * in the Software without restriction, including without limitation the rights 9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 10 * copies of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 22 * THE SOFTWARE. 23 */ 24 #include "qapi-visit.h" 25 #include "qapi/qmp-output-visitor.h" 26 #include "qapi/qmp/qjson.h" 27 #include "qemu-common.h" 28 #include "qemu/option.h" 29 #include "qemu/error-report.h" 30 #include "qemu/osdep.h" 31 #include "sysemu/sysemu.h" 32 #include "sysemu/block-backend.h" 33 #include "block/block_int.h" 34 #include "block/blockjob.h" 35 #include "block/qapi.h" 36 #include <getopt.h> 37 38 #define QEMU_IMG_VERSION "qemu-img version " QEMU_VERSION QEMU_PKGVERSION \ 39 ", Copyright (c) 2004-2008 Fabrice Bellard\n" 40 41 typedef struct img_cmd_t { 42 const char *name; 43 int (*handler)(int argc, char **argv); 44 } img_cmd_t; 45 46 enum { 47 OPTION_OUTPUT = 256, 48 OPTION_BACKING_CHAIN = 257, 49 }; 50 51 typedef enum OutputFormat { 52 OFORMAT_JSON, 53 OFORMAT_HUMAN, 54 } OutputFormat; 55 56 /* Default to cache=writeback as data integrity is not important for qemu-tcg. */ 57 #define BDRV_O_FLAGS BDRV_O_CACHE_WB 58 #define BDRV_DEFAULT_CACHE "writeback" 59 60 static void format_print(void *opaque, const char *name) 61 { 62 printf(" %s", name); 63 } 64 65 static void QEMU_NORETURN GCC_FMT_ATTR(1, 2) error_exit(const char *fmt, ...) 66 { 67 va_list ap; 68 69 error_printf("qemu-img: "); 70 71 va_start(ap, fmt); 72 error_vprintf(fmt, ap); 73 va_end(ap); 74 75 error_printf("\nTry 'qemu-img --help' for more information\n"); 76 exit(EXIT_FAILURE); 77 } 78 79 /* Please keep in synch with qemu-img.texi */ 80 static void QEMU_NORETURN help(void) 81 { 82 const char *help_msg = 83 QEMU_IMG_VERSION 84 "usage: qemu-img command [command options]\n" 85 "QEMU disk image utility\n" 86 "\n" 87 "Command syntax:\n" 88 #define DEF(option, callback, arg_string) \ 89 " " arg_string "\n" 90 #include "qemu-img-cmds.h" 91 #undef DEF 92 #undef GEN_DOCS 93 "\n" 94 "Command parameters:\n" 95 " 'filename' is a disk image filename\n" 96 " 'fmt' is the disk image format. It is guessed automatically in most cases\n" 97 " 'cache' is the cache mode used to write the output disk image, the valid\n" 98 " options are: 'none', 'writeback' (default, except for convert), 'writethrough',\n" 99 " 'directsync' and 'unsafe' (default for convert)\n" 100 " 'src_cache' is the cache mode used to read input disk images, the valid\n" 101 " options are the same as for the 'cache' option\n" 102 " 'size' is the disk image size in bytes. Optional suffixes\n" 103 " 'k' or 'K' (kilobyte, 1024), 'M' (megabyte, 1024k), 'G' (gigabyte, 1024M),\n" 104 " 'T' (terabyte, 1024G), 'P' (petabyte, 1024T) and 'E' (exabyte, 1024P) are\n" 105 " supported. 'b' is ignored.\n" 106 " 'output_filename' is the destination disk image filename\n" 107 " 'output_fmt' is the destination format\n" 108 " 'options' is a comma separated list of format specific options in a\n" 109 " name=value format. Use -o ? for an overview of the options supported by the\n" 110 " used format\n" 111 " 'snapshot_param' is param used for internal snapshot, format\n" 112 " is 'snapshot.id=[ID],snapshot.name=[NAME]', or\n" 113 " '[ID_OR_NAME]'\n" 114 " 'snapshot_id_or_name' is deprecated, use 'snapshot_param'\n" 115 " instead\n" 116 " '-c' indicates that target image must be compressed (qcow format only)\n" 117 " '-u' enables unsafe rebasing. It is assumed that old and new backing file\n" 118 " match exactly. The image doesn't need a working backing file before\n" 119 " rebasing in this case (useful for renaming the backing file)\n" 120 " '-h' with or without a command shows this help and lists the supported formats\n" 121 " '-p' show progress of command (only certain commands)\n" 122 " '-q' use Quiet mode - do not print any output (except errors)\n" 123 " '-S' indicates the consecutive number of bytes (defaults to 4k) that must\n" 124 " contain only zeros for qemu-img to create a sparse image during\n" 125 " conversion. If the number of bytes is 0, the source will not be scanned for\n" 126 " unallocated or zero sectors, and the destination image will always be\n" 127 " fully allocated\n" 128 " '--output' takes the format in which the output must be done (human or json)\n" 129 " '-n' skips the target volume creation (useful if the volume is created\n" 130 " prior to running qemu-img)\n" 131 "\n" 132 "Parameters to check subcommand:\n" 133 " '-r' tries to repair any inconsistencies that are found during the check.\n" 134 " '-r leaks' repairs only cluster leaks, whereas '-r all' fixes all\n" 135 " kinds of errors, with a higher risk of choosing the wrong fix or\n" 136 " hiding corruption that has already occurred.\n" 137 "\n" 138 "Parameters to snapshot subcommand:\n" 139 " 'snapshot' is the name of the snapshot to create, apply or delete\n" 140 " '-a' applies a snapshot (revert disk to saved state)\n" 141 " '-c' creates a snapshot\n" 142 " '-d' deletes a snapshot\n" 143 " '-l' lists all snapshots in the given image\n" 144 "\n" 145 "Parameters to compare subcommand:\n" 146 " '-f' first image format\n" 147 " '-F' second image format\n" 148 " '-s' run in Strict mode - fail on different image size or sector allocation\n"; 149 150 printf("%s\nSupported formats:", help_msg); 151 bdrv_iterate_format(format_print, NULL); 152 printf("\n"); 153 exit(EXIT_SUCCESS); 154 } 155 156 static int GCC_FMT_ATTR(2, 3) qprintf(bool quiet, const char *fmt, ...) 157 { 158 int ret = 0; 159 if (!quiet) { 160 va_list args; 161 va_start(args, fmt); 162 ret = vprintf(fmt, args); 163 va_end(args); 164 } 165 return ret; 166 } 167 168 169 static int print_block_option_help(const char *filename, const char *fmt) 170 { 171 BlockDriver *drv, *proto_drv; 172 QemuOptsList *create_opts = NULL; 173 Error *local_err = NULL; 174 175 /* Find driver and parse its options */ 176 drv = bdrv_find_format(fmt); 177 if (!drv) { 178 error_report("Unknown file format '%s'", fmt); 179 return 1; 180 } 181 182 create_opts = qemu_opts_append(create_opts, drv->create_opts); 183 if (filename) { 184 proto_drv = bdrv_find_protocol(filename, true, &local_err); 185 if (!proto_drv) { 186 error_report_err(local_err); 187 qemu_opts_free(create_opts); 188 return 1; 189 } 190 create_opts = qemu_opts_append(create_opts, proto_drv->create_opts); 191 } 192 193 qemu_opts_print_help(create_opts); 194 qemu_opts_free(create_opts); 195 return 0; 196 } 197 198 static BlockBackend *img_open(const char *id, const char *filename, 199 const char *fmt, int flags, 200 bool require_io, bool quiet) 201 { 202 BlockBackend *blk; 203 BlockDriverState *bs; 204 char password[256]; 205 Error *local_err = NULL; 206 QDict *options = NULL; 207 208 if (fmt) { 209 options = qdict_new(); 210 qdict_put(options, "driver", qstring_from_str(fmt)); 211 } 212 213 blk = blk_new_open(id, filename, NULL, options, flags, &local_err); 214 if (!blk) { 215 error_report("Could not open '%s': %s", filename, 216 error_get_pretty(local_err)); 217 error_free(local_err); 218 goto fail; 219 } 220 221 bs = blk_bs(blk); 222 if (bdrv_is_encrypted(bs) && require_io) { 223 qprintf(quiet, "Disk image '%s' is encrypted.\n", filename); 224 if (qemu_read_password(password, sizeof(password)) < 0) { 225 error_report("No password given"); 226 goto fail; 227 } 228 if (bdrv_set_key(bs, password) < 0) { 229 error_report("invalid password"); 230 goto fail; 231 } 232 } 233 return blk; 234 fail: 235 blk_unref(blk); 236 return NULL; 237 } 238 239 static int add_old_style_options(const char *fmt, QemuOpts *opts, 240 const char *base_filename, 241 const char *base_fmt) 242 { 243 Error *err = NULL; 244 245 if (base_filename) { 246 qemu_opt_set(opts, BLOCK_OPT_BACKING_FILE, base_filename, &err); 247 if (err) { 248 error_report("Backing file not supported for file format '%s'", 249 fmt); 250 error_free(err); 251 return -1; 252 } 253 } 254 if (base_fmt) { 255 qemu_opt_set(opts, BLOCK_OPT_BACKING_FMT, base_fmt, &err); 256 if (err) { 257 error_report("Backing file format not supported for file " 258 "format '%s'", fmt); 259 error_free(err); 260 return -1; 261 } 262 } 263 return 0; 264 } 265 266 static int img_create(int argc, char **argv) 267 { 268 int c; 269 uint64_t img_size = -1; 270 const char *fmt = "raw"; 271 const char *base_fmt = NULL; 272 const char *filename; 273 const char *base_filename = NULL; 274 char *options = NULL; 275 Error *local_err = NULL; 276 bool quiet = false; 277 278 for(;;) { 279 c = getopt(argc, argv, "F:b:f:he6o:q"); 280 if (c == -1) { 281 break; 282 } 283 switch(c) { 284 case '?': 285 case 'h': 286 help(); 287 break; 288 case 'F': 289 base_fmt = optarg; 290 break; 291 case 'b': 292 base_filename = optarg; 293 break; 294 case 'f': 295 fmt = optarg; 296 break; 297 case 'e': 298 error_report("option -e is deprecated, please use \'-o " 299 "encryption\' instead!"); 300 goto fail; 301 case '6': 302 error_report("option -6 is deprecated, please use \'-o " 303 "compat6\' instead!"); 304 goto fail; 305 case 'o': 306 if (!is_valid_option_list(optarg)) { 307 error_report("Invalid option list: %s", optarg); 308 goto fail; 309 } 310 if (!options) { 311 options = g_strdup(optarg); 312 } else { 313 char *old_options = options; 314 options = g_strdup_printf("%s,%s", options, optarg); 315 g_free(old_options); 316 } 317 break; 318 case 'q': 319 quiet = true; 320 break; 321 } 322 } 323 324 /* Get the filename */ 325 filename = (optind < argc) ? argv[optind] : NULL; 326 if (options && has_help_option(options)) { 327 g_free(options); 328 return print_block_option_help(filename, fmt); 329 } 330 331 if (optind >= argc) { 332 error_exit("Expecting image file name"); 333 } 334 optind++; 335 336 /* Get image size, if specified */ 337 if (optind < argc) { 338 int64_t sval; 339 char *end; 340 sval = strtosz_suffix(argv[optind++], &end, STRTOSZ_DEFSUFFIX_B); 341 if (sval < 0 || *end) { 342 if (sval == -ERANGE) { 343 error_report("Image size must be less than 8 EiB!"); 344 } else { 345 error_report("Invalid image size specified! You may use k, M, " 346 "G, T, P or E suffixes for "); 347 error_report("kilobytes, megabytes, gigabytes, terabytes, " 348 "petabytes and exabytes."); 349 } 350 goto fail; 351 } 352 img_size = (uint64_t)sval; 353 } 354 if (optind != argc) { 355 error_exit("Unexpected argument: %s", argv[optind]); 356 } 357 358 bdrv_img_create(filename, fmt, base_filename, base_fmt, 359 options, img_size, BDRV_O_FLAGS, &local_err, quiet); 360 if (local_err) { 361 error_report("%s: %s", filename, error_get_pretty(local_err)); 362 error_free(local_err); 363 goto fail; 364 } 365 366 g_free(options); 367 return 0; 368 369 fail: 370 g_free(options); 371 return 1; 372 } 373 374 static void dump_json_image_check(ImageCheck *check, bool quiet) 375 { 376 Error *local_err = NULL; 377 QString *str; 378 QmpOutputVisitor *ov = qmp_output_visitor_new(); 379 QObject *obj; 380 visit_type_ImageCheck(qmp_output_get_visitor(ov), 381 &check, NULL, &local_err); 382 obj = qmp_output_get_qobject(ov); 383 str = qobject_to_json_pretty(obj); 384 assert(str != NULL); 385 qprintf(quiet, "%s\n", qstring_get_str(str)); 386 qobject_decref(obj); 387 qmp_output_visitor_cleanup(ov); 388 QDECREF(str); 389 } 390 391 static void dump_human_image_check(ImageCheck *check, bool quiet) 392 { 393 if (!(check->corruptions || check->leaks || check->check_errors)) { 394 qprintf(quiet, "No errors were found on the image.\n"); 395 } else { 396 if (check->corruptions) { 397 qprintf(quiet, "\n%" PRId64 " errors were found on the image.\n" 398 "Data may be corrupted, or further writes to the image " 399 "may corrupt it.\n", 400 check->corruptions); 401 } 402 403 if (check->leaks) { 404 qprintf(quiet, 405 "\n%" PRId64 " leaked clusters were found on the image.\n" 406 "This means waste of disk space, but no harm to data.\n", 407 check->leaks); 408 } 409 410 if (check->check_errors) { 411 qprintf(quiet, 412 "\n%" PRId64 413 " internal errors have occurred during the check.\n", 414 check->check_errors); 415 } 416 } 417 418 if (check->total_clusters != 0 && check->allocated_clusters != 0) { 419 qprintf(quiet, "%" PRId64 "/%" PRId64 " = %0.2f%% allocated, " 420 "%0.2f%% fragmented, %0.2f%% compressed clusters\n", 421 check->allocated_clusters, check->total_clusters, 422 check->allocated_clusters * 100.0 / check->total_clusters, 423 check->fragmented_clusters * 100.0 / check->allocated_clusters, 424 check->compressed_clusters * 100.0 / 425 check->allocated_clusters); 426 } 427 428 if (check->image_end_offset) { 429 qprintf(quiet, 430 "Image end offset: %" PRId64 "\n", check->image_end_offset); 431 } 432 } 433 434 static int collect_image_check(BlockDriverState *bs, 435 ImageCheck *check, 436 const char *filename, 437 const char *fmt, 438 int fix) 439 { 440 int ret; 441 BdrvCheckResult result; 442 443 ret = bdrv_check(bs, &result, fix); 444 if (ret < 0) { 445 return ret; 446 } 447 448 check->filename = g_strdup(filename); 449 check->format = g_strdup(bdrv_get_format_name(bs)); 450 check->check_errors = result.check_errors; 451 check->corruptions = result.corruptions; 452 check->has_corruptions = result.corruptions != 0; 453 check->leaks = result.leaks; 454 check->has_leaks = result.leaks != 0; 455 check->corruptions_fixed = result.corruptions_fixed; 456 check->has_corruptions_fixed = result.corruptions != 0; 457 check->leaks_fixed = result.leaks_fixed; 458 check->has_leaks_fixed = result.leaks != 0; 459 check->image_end_offset = result.image_end_offset; 460 check->has_image_end_offset = result.image_end_offset != 0; 461 check->total_clusters = result.bfi.total_clusters; 462 check->has_total_clusters = result.bfi.total_clusters != 0; 463 check->allocated_clusters = result.bfi.allocated_clusters; 464 check->has_allocated_clusters = result.bfi.allocated_clusters != 0; 465 check->fragmented_clusters = result.bfi.fragmented_clusters; 466 check->has_fragmented_clusters = result.bfi.fragmented_clusters != 0; 467 check->compressed_clusters = result.bfi.compressed_clusters; 468 check->has_compressed_clusters = result.bfi.compressed_clusters != 0; 469 470 return 0; 471 } 472 473 /* 474 * Checks an image for consistency. Exit codes: 475 * 476 * 0 - Check completed, image is good 477 * 1 - Check not completed because of internal errors 478 * 2 - Check completed, image is corrupted 479 * 3 - Check completed, image has leaked clusters, but is good otherwise 480 * 63 - Checks are not supported by the image format 481 */ 482 static int img_check(int argc, char **argv) 483 { 484 int c, ret; 485 OutputFormat output_format = OFORMAT_HUMAN; 486 const char *filename, *fmt, *output, *cache; 487 BlockBackend *blk; 488 BlockDriverState *bs; 489 int fix = 0; 490 int flags = BDRV_O_FLAGS | BDRV_O_CHECK; 491 ImageCheck *check; 492 bool quiet = false; 493 494 fmt = NULL; 495 output = NULL; 496 cache = BDRV_DEFAULT_CACHE; 497 for(;;) { 498 int option_index = 0; 499 static const struct option long_options[] = { 500 {"help", no_argument, 0, 'h'}, 501 {"format", required_argument, 0, 'f'}, 502 {"repair", required_argument, 0, 'r'}, 503 {"output", required_argument, 0, OPTION_OUTPUT}, 504 {0, 0, 0, 0} 505 }; 506 c = getopt_long(argc, argv, "hf:r:T:q", 507 long_options, &option_index); 508 if (c == -1) { 509 break; 510 } 511 switch(c) { 512 case '?': 513 case 'h': 514 help(); 515 break; 516 case 'f': 517 fmt = optarg; 518 break; 519 case 'r': 520 flags |= BDRV_O_RDWR; 521 522 if (!strcmp(optarg, "leaks")) { 523 fix = BDRV_FIX_LEAKS; 524 } else if (!strcmp(optarg, "all")) { 525 fix = BDRV_FIX_LEAKS | BDRV_FIX_ERRORS; 526 } else { 527 error_exit("Unknown option value for -r " 528 "(expecting 'leaks' or 'all'): %s", optarg); 529 } 530 break; 531 case OPTION_OUTPUT: 532 output = optarg; 533 break; 534 case 'T': 535 cache = optarg; 536 break; 537 case 'q': 538 quiet = true; 539 break; 540 } 541 } 542 if (optind != argc - 1) { 543 error_exit("Expecting one image file name"); 544 } 545 filename = argv[optind++]; 546 547 if (output && !strcmp(output, "json")) { 548 output_format = OFORMAT_JSON; 549 } else if (output && !strcmp(output, "human")) { 550 output_format = OFORMAT_HUMAN; 551 } else if (output) { 552 error_report("--output must be used with human or json as argument."); 553 return 1; 554 } 555 556 ret = bdrv_parse_cache_flags(cache, &flags); 557 if (ret < 0) { 558 error_report("Invalid source cache option: %s", cache); 559 return 1; 560 } 561 562 blk = img_open("image", filename, fmt, flags, true, quiet); 563 if (!blk) { 564 return 1; 565 } 566 bs = blk_bs(blk); 567 568 check = g_new0(ImageCheck, 1); 569 ret = collect_image_check(bs, check, filename, fmt, fix); 570 571 if (ret == -ENOTSUP) { 572 error_report("This image format does not support checks"); 573 ret = 63; 574 goto fail; 575 } 576 577 if (check->corruptions_fixed || check->leaks_fixed) { 578 int corruptions_fixed, leaks_fixed; 579 580 leaks_fixed = check->leaks_fixed; 581 corruptions_fixed = check->corruptions_fixed; 582 583 if (output_format == OFORMAT_HUMAN) { 584 qprintf(quiet, 585 "The following inconsistencies were found and repaired:\n\n" 586 " %" PRId64 " leaked clusters\n" 587 " %" PRId64 " corruptions\n\n" 588 "Double checking the fixed image now...\n", 589 check->leaks_fixed, 590 check->corruptions_fixed); 591 } 592 593 ret = collect_image_check(bs, check, filename, fmt, 0); 594 595 check->leaks_fixed = leaks_fixed; 596 check->corruptions_fixed = corruptions_fixed; 597 } 598 599 if (!ret) { 600 switch (output_format) { 601 case OFORMAT_HUMAN: 602 dump_human_image_check(check, quiet); 603 break; 604 case OFORMAT_JSON: 605 dump_json_image_check(check, quiet); 606 break; 607 } 608 } 609 610 if (ret || check->check_errors) { 611 if (ret) { 612 error_report("Check failed: %s", strerror(-ret)); 613 } else { 614 error_report("Check failed"); 615 } 616 ret = 1; 617 goto fail; 618 } 619 620 if (check->corruptions) { 621 ret = 2; 622 } else if (check->leaks) { 623 ret = 3; 624 } else { 625 ret = 0; 626 } 627 628 fail: 629 qapi_free_ImageCheck(check); 630 blk_unref(blk); 631 return ret; 632 } 633 634 typedef struct CommonBlockJobCBInfo { 635 BlockDriverState *bs; 636 Error **errp; 637 } CommonBlockJobCBInfo; 638 639 static void common_block_job_cb(void *opaque, int ret) 640 { 641 CommonBlockJobCBInfo *cbi = opaque; 642 643 if (ret < 0) { 644 error_setg_errno(cbi->errp, -ret, "Block job failed"); 645 } 646 647 /* Drop this block job's reference */ 648 bdrv_unref(cbi->bs); 649 } 650 651 static void run_block_job(BlockJob *job, Error **errp) 652 { 653 AioContext *aio_context = bdrv_get_aio_context(job->bs); 654 655 do { 656 aio_poll(aio_context, true); 657 qemu_progress_print((float)job->offset / job->len * 100.f, 0); 658 } while (!job->ready); 659 660 block_job_complete_sync(job, errp); 661 662 /* A block job may finish instantaneously without publishing any progress, 663 * so just signal completion here */ 664 qemu_progress_print(100.f, 0); 665 } 666 667 static int img_commit(int argc, char **argv) 668 { 669 int c, ret, flags; 670 const char *filename, *fmt, *cache, *base; 671 BlockBackend *blk; 672 BlockDriverState *bs, *base_bs; 673 bool progress = false, quiet = false, drop = false; 674 Error *local_err = NULL; 675 CommonBlockJobCBInfo cbi; 676 677 fmt = NULL; 678 cache = BDRV_DEFAULT_CACHE; 679 base = NULL; 680 for(;;) { 681 c = getopt(argc, argv, "f:ht:b:dpq"); 682 if (c == -1) { 683 break; 684 } 685 switch(c) { 686 case '?': 687 case 'h': 688 help(); 689 break; 690 case 'f': 691 fmt = optarg; 692 break; 693 case 't': 694 cache = optarg; 695 break; 696 case 'b': 697 base = optarg; 698 /* -b implies -d */ 699 drop = true; 700 break; 701 case 'd': 702 drop = true; 703 break; 704 case 'p': 705 progress = true; 706 break; 707 case 'q': 708 quiet = true; 709 break; 710 } 711 } 712 713 /* Progress is not shown in Quiet mode */ 714 if (quiet) { 715 progress = false; 716 } 717 718 if (optind != argc - 1) { 719 error_exit("Expecting one image file name"); 720 } 721 filename = argv[optind++]; 722 723 flags = BDRV_O_RDWR | BDRV_O_UNMAP; 724 ret = bdrv_parse_cache_flags(cache, &flags); 725 if (ret < 0) { 726 error_report("Invalid cache option: %s", cache); 727 return 1; 728 } 729 730 blk = img_open("image", filename, fmt, flags, true, quiet); 731 if (!blk) { 732 return 1; 733 } 734 bs = blk_bs(blk); 735 736 qemu_progress_init(progress, 1.f); 737 qemu_progress_print(0.f, 100); 738 739 if (base) { 740 base_bs = bdrv_find_backing_image(bs, base); 741 if (!base_bs) { 742 error_setg(&local_err, QERR_BASE_NOT_FOUND, base); 743 goto done; 744 } 745 } else { 746 /* This is different from QMP, which by default uses the deepest file in 747 * the backing chain (i.e., the very base); however, the traditional 748 * behavior of qemu-img commit is using the immediate backing file. */ 749 base_bs = bs->backing_hd; 750 if (!base_bs) { 751 error_setg(&local_err, "Image does not have a backing file"); 752 goto done; 753 } 754 } 755 756 cbi = (CommonBlockJobCBInfo){ 757 .errp = &local_err, 758 .bs = bs, 759 }; 760 761 commit_active_start(bs, base_bs, 0, BLOCKDEV_ON_ERROR_REPORT, 762 common_block_job_cb, &cbi, &local_err); 763 if (local_err) { 764 goto done; 765 } 766 767 /* The block job will swap base_bs and bs (which is not what we really want 768 * here, but okay) and unref base_bs (after the swap, i.e., the old top 769 * image). In order to still be able to empty that top image afterwards, 770 * increment the reference counter here preemptively. */ 771 if (!drop) { 772 bdrv_ref(base_bs); 773 } 774 775 run_block_job(bs->job, &local_err); 776 if (local_err) { 777 goto unref_backing; 778 } 779 780 if (!drop && base_bs->drv->bdrv_make_empty) { 781 ret = base_bs->drv->bdrv_make_empty(base_bs); 782 if (ret) { 783 error_setg_errno(&local_err, -ret, "Could not empty %s", 784 filename); 785 goto unref_backing; 786 } 787 } 788 789 unref_backing: 790 if (!drop) { 791 bdrv_unref(base_bs); 792 } 793 794 done: 795 qemu_progress_end(); 796 797 blk_unref(blk); 798 799 if (local_err) { 800 error_report_err(local_err); 801 return 1; 802 } 803 804 qprintf(quiet, "Image committed.\n"); 805 return 0; 806 } 807 808 /* 809 * Returns true iff the first sector pointed to by 'buf' contains at least 810 * a non-NUL byte. 811 * 812 * 'pnum' is set to the number of sectors (including and immediately following 813 * the first one) that are known to be in the same allocated/unallocated state. 814 */ 815 static int is_allocated_sectors(const uint8_t *buf, int n, int *pnum) 816 { 817 bool is_zero; 818 int i; 819 820 if (n <= 0) { 821 *pnum = 0; 822 return 0; 823 } 824 is_zero = buffer_is_zero(buf, 512); 825 for(i = 1; i < n; i++) { 826 buf += 512; 827 if (is_zero != buffer_is_zero(buf, 512)) { 828 break; 829 } 830 } 831 *pnum = i; 832 return !is_zero; 833 } 834 835 /* 836 * Like is_allocated_sectors, but if the buffer starts with a used sector, 837 * up to 'min' consecutive sectors containing zeros are ignored. This avoids 838 * breaking up write requests for only small sparse areas. 839 */ 840 static int is_allocated_sectors_min(const uint8_t *buf, int n, int *pnum, 841 int min) 842 { 843 int ret; 844 int num_checked, num_used; 845 846 if (n < min) { 847 min = n; 848 } 849 850 ret = is_allocated_sectors(buf, n, pnum); 851 if (!ret) { 852 return ret; 853 } 854 855 num_used = *pnum; 856 buf += BDRV_SECTOR_SIZE * *pnum; 857 n -= *pnum; 858 num_checked = num_used; 859 860 while (n > 0) { 861 ret = is_allocated_sectors(buf, n, pnum); 862 863 buf += BDRV_SECTOR_SIZE * *pnum; 864 n -= *pnum; 865 num_checked += *pnum; 866 if (ret) { 867 num_used = num_checked; 868 } else if (*pnum >= min) { 869 break; 870 } 871 } 872 873 *pnum = num_used; 874 return 1; 875 } 876 877 /* 878 * Compares two buffers sector by sector. Returns 0 if the first sector of both 879 * buffers matches, non-zero otherwise. 880 * 881 * pnum is set to the number of sectors (including and immediately following 882 * the first one) that are known to have the same comparison result 883 */ 884 static int compare_sectors(const uint8_t *buf1, const uint8_t *buf2, int n, 885 int *pnum) 886 { 887 bool res; 888 int i; 889 890 if (n <= 0) { 891 *pnum = 0; 892 return 0; 893 } 894 895 res = !!memcmp(buf1, buf2, 512); 896 for(i = 1; i < n; i++) { 897 buf1 += 512; 898 buf2 += 512; 899 900 if (!!memcmp(buf1, buf2, 512) != res) { 901 break; 902 } 903 } 904 905 *pnum = i; 906 return res; 907 } 908 909 #define IO_BUF_SIZE (2 * 1024 * 1024) 910 911 static int64_t sectors_to_bytes(int64_t sectors) 912 { 913 return sectors << BDRV_SECTOR_BITS; 914 } 915 916 static int64_t sectors_to_process(int64_t total, int64_t from) 917 { 918 return MIN(total - from, IO_BUF_SIZE >> BDRV_SECTOR_BITS); 919 } 920 921 /* 922 * Check if passed sectors are empty (not allocated or contain only 0 bytes) 923 * 924 * Returns 0 in case sectors are filled with 0, 1 if sectors contain non-zero 925 * data and negative value on error. 926 * 927 * @param blk: BlockBackend for the image 928 * @param sect_num: Number of first sector to check 929 * @param sect_count: Number of sectors to check 930 * @param filename: Name of disk file we are checking (logging purpose) 931 * @param buffer: Allocated buffer for storing read data 932 * @param quiet: Flag for quiet mode 933 */ 934 static int check_empty_sectors(BlockBackend *blk, int64_t sect_num, 935 int sect_count, const char *filename, 936 uint8_t *buffer, bool quiet) 937 { 938 int pnum, ret = 0; 939 ret = blk_read(blk, sect_num, buffer, sect_count); 940 if (ret < 0) { 941 error_report("Error while reading offset %" PRId64 " of %s: %s", 942 sectors_to_bytes(sect_num), filename, strerror(-ret)); 943 return ret; 944 } 945 ret = is_allocated_sectors(buffer, sect_count, &pnum); 946 if (ret || pnum != sect_count) { 947 qprintf(quiet, "Content mismatch at offset %" PRId64 "!\n", 948 sectors_to_bytes(ret ? sect_num : sect_num + pnum)); 949 return 1; 950 } 951 952 return 0; 953 } 954 955 /* 956 * Compares two images. Exit codes: 957 * 958 * 0 - Images are identical 959 * 1 - Images differ 960 * >1 - Error occurred 961 */ 962 static int img_compare(int argc, char **argv) 963 { 964 const char *fmt1 = NULL, *fmt2 = NULL, *cache, *filename1, *filename2; 965 BlockBackend *blk1, *blk2; 966 BlockDriverState *bs1, *bs2; 967 int64_t total_sectors1, total_sectors2; 968 uint8_t *buf1 = NULL, *buf2 = NULL; 969 int pnum1, pnum2; 970 int allocated1, allocated2; 971 int ret = 0; /* return value - 0 Ident, 1 Different, >1 Error */ 972 bool progress = false, quiet = false, strict = false; 973 int flags; 974 int64_t total_sectors; 975 int64_t sector_num = 0; 976 int64_t nb_sectors; 977 int c, pnum; 978 uint64_t progress_base; 979 980 cache = BDRV_DEFAULT_CACHE; 981 for (;;) { 982 c = getopt(argc, argv, "hf:F:T:pqs"); 983 if (c == -1) { 984 break; 985 } 986 switch (c) { 987 case '?': 988 case 'h': 989 help(); 990 break; 991 case 'f': 992 fmt1 = optarg; 993 break; 994 case 'F': 995 fmt2 = optarg; 996 break; 997 case 'T': 998 cache = optarg; 999 break; 1000 case 'p': 1001 progress = true; 1002 break; 1003 case 'q': 1004 quiet = true; 1005 break; 1006 case 's': 1007 strict = true; 1008 break; 1009 } 1010 } 1011 1012 /* Progress is not shown in Quiet mode */ 1013 if (quiet) { 1014 progress = false; 1015 } 1016 1017 1018 if (optind != argc - 2) { 1019 error_exit("Expecting two image file names"); 1020 } 1021 filename1 = argv[optind++]; 1022 filename2 = argv[optind++]; 1023 1024 /* Initialize before goto out */ 1025 qemu_progress_init(progress, 2.0); 1026 1027 flags = BDRV_O_FLAGS; 1028 ret = bdrv_parse_cache_flags(cache, &flags); 1029 if (ret < 0) { 1030 error_report("Invalid source cache option: %s", cache); 1031 ret = 2; 1032 goto out3; 1033 } 1034 1035 blk1 = img_open("image_1", filename1, fmt1, flags, true, quiet); 1036 if (!blk1) { 1037 ret = 2; 1038 goto out3; 1039 } 1040 bs1 = blk_bs(blk1); 1041 1042 blk2 = img_open("image_2", filename2, fmt2, flags, true, quiet); 1043 if (!blk2) { 1044 ret = 2; 1045 goto out2; 1046 } 1047 bs2 = blk_bs(blk2); 1048 1049 buf1 = blk_blockalign(blk1, IO_BUF_SIZE); 1050 buf2 = blk_blockalign(blk2, IO_BUF_SIZE); 1051 total_sectors1 = blk_nb_sectors(blk1); 1052 if (total_sectors1 < 0) { 1053 error_report("Can't get size of %s: %s", 1054 filename1, strerror(-total_sectors1)); 1055 ret = 4; 1056 goto out; 1057 } 1058 total_sectors2 = blk_nb_sectors(blk2); 1059 if (total_sectors2 < 0) { 1060 error_report("Can't get size of %s: %s", 1061 filename2, strerror(-total_sectors2)); 1062 ret = 4; 1063 goto out; 1064 } 1065 total_sectors = MIN(total_sectors1, total_sectors2); 1066 progress_base = MAX(total_sectors1, total_sectors2); 1067 1068 qemu_progress_print(0, 100); 1069 1070 if (strict && total_sectors1 != total_sectors2) { 1071 ret = 1; 1072 qprintf(quiet, "Strict mode: Image size mismatch!\n"); 1073 goto out; 1074 } 1075 1076 for (;;) { 1077 nb_sectors = sectors_to_process(total_sectors, sector_num); 1078 if (nb_sectors <= 0) { 1079 break; 1080 } 1081 allocated1 = bdrv_is_allocated_above(bs1, NULL, sector_num, nb_sectors, 1082 &pnum1); 1083 if (allocated1 < 0) { 1084 ret = 3; 1085 error_report("Sector allocation test failed for %s", filename1); 1086 goto out; 1087 } 1088 1089 allocated2 = bdrv_is_allocated_above(bs2, NULL, sector_num, nb_sectors, 1090 &pnum2); 1091 if (allocated2 < 0) { 1092 ret = 3; 1093 error_report("Sector allocation test failed for %s", filename2); 1094 goto out; 1095 } 1096 nb_sectors = MIN(pnum1, pnum2); 1097 1098 if (allocated1 == allocated2) { 1099 if (allocated1) { 1100 ret = blk_read(blk1, sector_num, buf1, nb_sectors); 1101 if (ret < 0) { 1102 error_report("Error while reading offset %" PRId64 " of %s:" 1103 " %s", sectors_to_bytes(sector_num), filename1, 1104 strerror(-ret)); 1105 ret = 4; 1106 goto out; 1107 } 1108 ret = blk_read(blk2, sector_num, buf2, nb_sectors); 1109 if (ret < 0) { 1110 error_report("Error while reading offset %" PRId64 1111 " of %s: %s", sectors_to_bytes(sector_num), 1112 filename2, strerror(-ret)); 1113 ret = 4; 1114 goto out; 1115 } 1116 ret = compare_sectors(buf1, buf2, nb_sectors, &pnum); 1117 if (ret || pnum != nb_sectors) { 1118 qprintf(quiet, "Content mismatch at offset %" PRId64 "!\n", 1119 sectors_to_bytes( 1120 ret ? sector_num : sector_num + pnum)); 1121 ret = 1; 1122 goto out; 1123 } 1124 } 1125 } else { 1126 if (strict) { 1127 ret = 1; 1128 qprintf(quiet, "Strict mode: Offset %" PRId64 1129 " allocation mismatch!\n", 1130 sectors_to_bytes(sector_num)); 1131 goto out; 1132 } 1133 1134 if (allocated1) { 1135 ret = check_empty_sectors(blk1, sector_num, nb_sectors, 1136 filename1, buf1, quiet); 1137 } else { 1138 ret = check_empty_sectors(blk2, sector_num, nb_sectors, 1139 filename2, buf1, quiet); 1140 } 1141 if (ret) { 1142 if (ret < 0) { 1143 error_report("Error while reading offset %" PRId64 ": %s", 1144 sectors_to_bytes(sector_num), strerror(-ret)); 1145 ret = 4; 1146 } 1147 goto out; 1148 } 1149 } 1150 sector_num += nb_sectors; 1151 qemu_progress_print(((float) nb_sectors / progress_base)*100, 100); 1152 } 1153 1154 if (total_sectors1 != total_sectors2) { 1155 BlockBackend *blk_over; 1156 int64_t total_sectors_over; 1157 const char *filename_over; 1158 1159 qprintf(quiet, "Warning: Image size mismatch!\n"); 1160 if (total_sectors1 > total_sectors2) { 1161 total_sectors_over = total_sectors1; 1162 blk_over = blk1; 1163 filename_over = filename1; 1164 } else { 1165 total_sectors_over = total_sectors2; 1166 blk_over = blk2; 1167 filename_over = filename2; 1168 } 1169 1170 for (;;) { 1171 nb_sectors = sectors_to_process(total_sectors_over, sector_num); 1172 if (nb_sectors <= 0) { 1173 break; 1174 } 1175 ret = bdrv_is_allocated_above(blk_bs(blk_over), NULL, sector_num, 1176 nb_sectors, &pnum); 1177 if (ret < 0) { 1178 ret = 3; 1179 error_report("Sector allocation test failed for %s", 1180 filename_over); 1181 goto out; 1182 1183 } 1184 nb_sectors = pnum; 1185 if (ret) { 1186 ret = check_empty_sectors(blk_over, sector_num, nb_sectors, 1187 filename_over, buf1, quiet); 1188 if (ret) { 1189 if (ret < 0) { 1190 error_report("Error while reading offset %" PRId64 1191 " of %s: %s", sectors_to_bytes(sector_num), 1192 filename_over, strerror(-ret)); 1193 ret = 4; 1194 } 1195 goto out; 1196 } 1197 } 1198 sector_num += nb_sectors; 1199 qemu_progress_print(((float) nb_sectors / progress_base)*100, 100); 1200 } 1201 } 1202 1203 qprintf(quiet, "Images are identical.\n"); 1204 ret = 0; 1205 1206 out: 1207 qemu_vfree(buf1); 1208 qemu_vfree(buf2); 1209 blk_unref(blk2); 1210 out2: 1211 blk_unref(blk1); 1212 out3: 1213 qemu_progress_end(); 1214 return ret; 1215 } 1216 1217 enum ImgConvertBlockStatus { 1218 BLK_DATA, 1219 BLK_ZERO, 1220 BLK_BACKING_FILE, 1221 }; 1222 1223 typedef struct ImgConvertState { 1224 BlockBackend **src; 1225 int64_t *src_sectors; 1226 int src_cur, src_num; 1227 int64_t src_cur_offset; 1228 int64_t total_sectors; 1229 int64_t allocated_sectors; 1230 enum ImgConvertBlockStatus status; 1231 int64_t sector_next_status; 1232 BlockBackend *target; 1233 bool has_zero_init; 1234 bool compressed; 1235 bool target_has_backing; 1236 int min_sparse; 1237 size_t cluster_sectors; 1238 size_t buf_sectors; 1239 } ImgConvertState; 1240 1241 static void convert_select_part(ImgConvertState *s, int64_t sector_num) 1242 { 1243 assert(sector_num >= s->src_cur_offset); 1244 while (sector_num - s->src_cur_offset >= s->src_sectors[s->src_cur]) { 1245 s->src_cur_offset += s->src_sectors[s->src_cur]; 1246 s->src_cur++; 1247 assert(s->src_cur < s->src_num); 1248 } 1249 } 1250 1251 static int convert_iteration_sectors(ImgConvertState *s, int64_t sector_num) 1252 { 1253 int64_t ret; 1254 int n; 1255 1256 convert_select_part(s, sector_num); 1257 1258 assert(s->total_sectors > sector_num); 1259 n = MIN(s->total_sectors - sector_num, BDRV_REQUEST_MAX_SECTORS); 1260 1261 if (s->sector_next_status <= sector_num) { 1262 ret = bdrv_get_block_status(blk_bs(s->src[s->src_cur]), 1263 sector_num - s->src_cur_offset, 1264 n, &n); 1265 if (ret < 0) { 1266 return ret; 1267 } 1268 1269 if (ret & BDRV_BLOCK_ZERO) { 1270 s->status = BLK_ZERO; 1271 } else if (ret & BDRV_BLOCK_DATA) { 1272 s->status = BLK_DATA; 1273 } else if (!s->target_has_backing) { 1274 /* Without a target backing file we must copy over the contents of 1275 * the backing file as well. */ 1276 /* TODO Check block status of the backing file chain to avoid 1277 * needlessly reading zeroes and limiting the iteration to the 1278 * buffer size */ 1279 s->status = BLK_DATA; 1280 } else { 1281 s->status = BLK_BACKING_FILE; 1282 } 1283 1284 s->sector_next_status = sector_num + n; 1285 } 1286 1287 n = MIN(n, s->sector_next_status - sector_num); 1288 if (s->status == BLK_DATA) { 1289 n = MIN(n, s->buf_sectors); 1290 } 1291 1292 /* We need to write complete clusters for compressed images, so if an 1293 * unallocated area is shorter than that, we must consider the whole 1294 * cluster allocated. */ 1295 if (s->compressed) { 1296 if (n < s->cluster_sectors) { 1297 n = MIN(s->cluster_sectors, s->total_sectors - sector_num); 1298 s->status = BLK_DATA; 1299 } else { 1300 n = QEMU_ALIGN_DOWN(n, s->cluster_sectors); 1301 } 1302 } 1303 1304 return n; 1305 } 1306 1307 static int convert_read(ImgConvertState *s, int64_t sector_num, int nb_sectors, 1308 uint8_t *buf) 1309 { 1310 int n; 1311 int ret; 1312 1313 if (s->status == BLK_ZERO || s->status == BLK_BACKING_FILE) { 1314 return 0; 1315 } 1316 1317 assert(nb_sectors <= s->buf_sectors); 1318 while (nb_sectors > 0) { 1319 BlockBackend *blk; 1320 int64_t bs_sectors; 1321 1322 /* In the case of compression with multiple source files, we can get a 1323 * nb_sectors that spreads into the next part. So we must be able to 1324 * read across multiple BDSes for one convert_read() call. */ 1325 convert_select_part(s, sector_num); 1326 blk = s->src[s->src_cur]; 1327 bs_sectors = s->src_sectors[s->src_cur]; 1328 1329 n = MIN(nb_sectors, bs_sectors - (sector_num - s->src_cur_offset)); 1330 ret = blk_read(blk, sector_num - s->src_cur_offset, buf, n); 1331 if (ret < 0) { 1332 return ret; 1333 } 1334 1335 sector_num += n; 1336 nb_sectors -= n; 1337 buf += n * BDRV_SECTOR_SIZE; 1338 } 1339 1340 return 0; 1341 } 1342 1343 static int convert_write(ImgConvertState *s, int64_t sector_num, int nb_sectors, 1344 const uint8_t *buf) 1345 { 1346 int ret; 1347 1348 while (nb_sectors > 0) { 1349 int n = nb_sectors; 1350 1351 switch (s->status) { 1352 case BLK_BACKING_FILE: 1353 /* If we have a backing file, leave clusters unallocated that are 1354 * unallocated in the source image, so that the backing file is 1355 * visible at the respective offset. */ 1356 assert(s->target_has_backing); 1357 break; 1358 1359 case BLK_DATA: 1360 /* We must always write compressed clusters as a whole, so don't 1361 * try to find zeroed parts in the buffer. We can only save the 1362 * write if the buffer is completely zeroed and we're allowed to 1363 * keep the target sparse. */ 1364 if (s->compressed) { 1365 if (s->has_zero_init && s->min_sparse && 1366 buffer_is_zero(buf, n * BDRV_SECTOR_SIZE)) 1367 { 1368 assert(!s->target_has_backing); 1369 break; 1370 } 1371 1372 ret = blk_write_compressed(s->target, sector_num, buf, n); 1373 if (ret < 0) { 1374 return ret; 1375 } 1376 break; 1377 } 1378 1379 /* If there is real non-zero data or we're told to keep the target 1380 * fully allocated (-S 0), we must write it. Otherwise we can treat 1381 * it as zero sectors. */ 1382 if (!s->min_sparse || 1383 is_allocated_sectors_min(buf, n, &n, s->min_sparse)) 1384 { 1385 ret = blk_write(s->target, sector_num, buf, n); 1386 if (ret < 0) { 1387 return ret; 1388 } 1389 break; 1390 } 1391 /* fall-through */ 1392 1393 case BLK_ZERO: 1394 if (s->has_zero_init) { 1395 break; 1396 } 1397 ret = blk_write_zeroes(s->target, sector_num, n, 0); 1398 if (ret < 0) { 1399 return ret; 1400 } 1401 break; 1402 } 1403 1404 sector_num += n; 1405 nb_sectors -= n; 1406 buf += n * BDRV_SECTOR_SIZE; 1407 } 1408 1409 return 0; 1410 } 1411 1412 static int convert_do_copy(ImgConvertState *s) 1413 { 1414 uint8_t *buf = NULL; 1415 int64_t sector_num, allocated_done; 1416 int ret; 1417 int n; 1418 1419 /* Check whether we have zero initialisation or can get it efficiently */ 1420 s->has_zero_init = s->min_sparse && !s->target_has_backing 1421 ? bdrv_has_zero_init(blk_bs(s->target)) 1422 : false; 1423 1424 if (!s->has_zero_init && !s->target_has_backing && 1425 bdrv_can_write_zeroes_with_unmap(blk_bs(s->target))) 1426 { 1427 ret = bdrv_make_zero(blk_bs(s->target), BDRV_REQ_MAY_UNMAP); 1428 if (ret == 0) { 1429 s->has_zero_init = true; 1430 } 1431 } 1432 1433 /* Allocate buffer for copied data. For compressed images, only one cluster 1434 * can be copied at a time. */ 1435 if (s->compressed) { 1436 if (s->cluster_sectors <= 0 || s->cluster_sectors > s->buf_sectors) { 1437 error_report("invalid cluster size"); 1438 ret = -EINVAL; 1439 goto fail; 1440 } 1441 s->buf_sectors = s->cluster_sectors; 1442 } 1443 buf = blk_blockalign(s->target, s->buf_sectors * BDRV_SECTOR_SIZE); 1444 1445 /* Calculate allocated sectors for progress */ 1446 s->allocated_sectors = 0; 1447 sector_num = 0; 1448 while (sector_num < s->total_sectors) { 1449 n = convert_iteration_sectors(s, sector_num); 1450 if (n < 0) { 1451 ret = n; 1452 goto fail; 1453 } 1454 if (s->status == BLK_DATA) { 1455 s->allocated_sectors += n; 1456 } 1457 sector_num += n; 1458 } 1459 1460 /* Do the copy */ 1461 s->src_cur = 0; 1462 s->src_cur_offset = 0; 1463 s->sector_next_status = 0; 1464 1465 sector_num = 0; 1466 allocated_done = 0; 1467 1468 while (sector_num < s->total_sectors) { 1469 n = convert_iteration_sectors(s, sector_num); 1470 if (n < 0) { 1471 ret = n; 1472 goto fail; 1473 } 1474 if (s->status == BLK_DATA) { 1475 allocated_done += n; 1476 qemu_progress_print(100.0 * allocated_done / s->allocated_sectors, 1477 0); 1478 } 1479 1480 ret = convert_read(s, sector_num, n, buf); 1481 if (ret < 0) { 1482 error_report("error while reading sector %" PRId64 1483 ": %s", sector_num, strerror(-ret)); 1484 goto fail; 1485 } 1486 1487 ret = convert_write(s, sector_num, n, buf); 1488 if (ret < 0) { 1489 error_report("error while writing sector %" PRId64 1490 ": %s", sector_num, strerror(-ret)); 1491 goto fail; 1492 } 1493 1494 sector_num += n; 1495 } 1496 1497 if (s->compressed) { 1498 /* signal EOF to align */ 1499 ret = blk_write_compressed(s->target, 0, NULL, 0); 1500 if (ret < 0) { 1501 goto fail; 1502 } 1503 } 1504 1505 ret = 0; 1506 fail: 1507 qemu_vfree(buf); 1508 return ret; 1509 } 1510 1511 static int img_convert(int argc, char **argv) 1512 { 1513 int c, bs_n, bs_i, compress, cluster_sectors, skip_create; 1514 int64_t ret = 0; 1515 int progress = 0, flags, src_flags; 1516 const char *fmt, *out_fmt, *cache, *src_cache, *out_baseimg, *out_filename; 1517 BlockDriver *drv, *proto_drv; 1518 BlockBackend **blk = NULL, *out_blk = NULL; 1519 BlockDriverState **bs = NULL, *out_bs = NULL; 1520 int64_t total_sectors; 1521 int64_t *bs_sectors = NULL; 1522 size_t bufsectors = IO_BUF_SIZE / BDRV_SECTOR_SIZE; 1523 BlockDriverInfo bdi; 1524 QemuOpts *opts = NULL; 1525 QemuOptsList *create_opts = NULL; 1526 const char *out_baseimg_param; 1527 char *options = NULL; 1528 const char *snapshot_name = NULL; 1529 int min_sparse = 8; /* Need at least 4k of zeros for sparse detection */ 1530 bool quiet = false; 1531 Error *local_err = NULL; 1532 QemuOpts *sn_opts = NULL; 1533 ImgConvertState state; 1534 1535 fmt = NULL; 1536 out_fmt = "raw"; 1537 cache = "unsafe"; 1538 src_cache = BDRV_DEFAULT_CACHE; 1539 out_baseimg = NULL; 1540 compress = 0; 1541 skip_create = 0; 1542 for(;;) { 1543 c = getopt(argc, argv, "hf:O:B:ce6o:s:l:S:pt:T:qn"); 1544 if (c == -1) { 1545 break; 1546 } 1547 switch(c) { 1548 case '?': 1549 case 'h': 1550 help(); 1551 break; 1552 case 'f': 1553 fmt = optarg; 1554 break; 1555 case 'O': 1556 out_fmt = optarg; 1557 break; 1558 case 'B': 1559 out_baseimg = optarg; 1560 break; 1561 case 'c': 1562 compress = 1; 1563 break; 1564 case 'e': 1565 error_report("option -e is deprecated, please use \'-o " 1566 "encryption\' instead!"); 1567 ret = -1; 1568 goto fail_getopt; 1569 case '6': 1570 error_report("option -6 is deprecated, please use \'-o " 1571 "compat6\' instead!"); 1572 ret = -1; 1573 goto fail_getopt; 1574 case 'o': 1575 if (!is_valid_option_list(optarg)) { 1576 error_report("Invalid option list: %s", optarg); 1577 ret = -1; 1578 goto fail_getopt; 1579 } 1580 if (!options) { 1581 options = g_strdup(optarg); 1582 } else { 1583 char *old_options = options; 1584 options = g_strdup_printf("%s,%s", options, optarg); 1585 g_free(old_options); 1586 } 1587 break; 1588 case 's': 1589 snapshot_name = optarg; 1590 break; 1591 case 'l': 1592 if (strstart(optarg, SNAPSHOT_OPT_BASE, NULL)) { 1593 sn_opts = qemu_opts_parse_noisily(&internal_snapshot_opts, 1594 optarg, false); 1595 if (!sn_opts) { 1596 error_report("Failed in parsing snapshot param '%s'", 1597 optarg); 1598 ret = -1; 1599 goto fail_getopt; 1600 } 1601 } else { 1602 snapshot_name = optarg; 1603 } 1604 break; 1605 case 'S': 1606 { 1607 int64_t sval; 1608 char *end; 1609 sval = strtosz_suffix(optarg, &end, STRTOSZ_DEFSUFFIX_B); 1610 if (sval < 0 || *end) { 1611 error_report("Invalid minimum zero buffer size for sparse output specified"); 1612 ret = -1; 1613 goto fail_getopt; 1614 } 1615 1616 min_sparse = sval / BDRV_SECTOR_SIZE; 1617 break; 1618 } 1619 case 'p': 1620 progress = 1; 1621 break; 1622 case 't': 1623 cache = optarg; 1624 break; 1625 case 'T': 1626 src_cache = optarg; 1627 break; 1628 case 'q': 1629 quiet = true; 1630 break; 1631 case 'n': 1632 skip_create = 1; 1633 break; 1634 } 1635 } 1636 1637 /* Initialize before goto out */ 1638 if (quiet) { 1639 progress = 0; 1640 } 1641 qemu_progress_init(progress, 1.0); 1642 1643 1644 bs_n = argc - optind - 1; 1645 out_filename = bs_n >= 1 ? argv[argc - 1] : NULL; 1646 1647 if (options && has_help_option(options)) { 1648 ret = print_block_option_help(out_filename, out_fmt); 1649 goto out; 1650 } 1651 1652 if (bs_n < 1) { 1653 error_exit("Must specify image file name"); 1654 } 1655 1656 1657 if (bs_n > 1 && out_baseimg) { 1658 error_report("-B makes no sense when concatenating multiple input " 1659 "images"); 1660 ret = -1; 1661 goto out; 1662 } 1663 1664 src_flags = BDRV_O_FLAGS; 1665 ret = bdrv_parse_cache_flags(src_cache, &src_flags); 1666 if (ret < 0) { 1667 error_report("Invalid source cache option: %s", src_cache); 1668 goto out; 1669 } 1670 1671 qemu_progress_print(0, 100); 1672 1673 blk = g_new0(BlockBackend *, bs_n); 1674 bs = g_new0(BlockDriverState *, bs_n); 1675 bs_sectors = g_new(int64_t, bs_n); 1676 1677 total_sectors = 0; 1678 for (bs_i = 0; bs_i < bs_n; bs_i++) { 1679 char *id = bs_n > 1 ? g_strdup_printf("source_%d", bs_i) 1680 : g_strdup("source"); 1681 blk[bs_i] = img_open(id, argv[optind + bs_i], fmt, src_flags, 1682 true, quiet); 1683 g_free(id); 1684 if (!blk[bs_i]) { 1685 ret = -1; 1686 goto out; 1687 } 1688 bs[bs_i] = blk_bs(blk[bs_i]); 1689 bs_sectors[bs_i] = blk_nb_sectors(blk[bs_i]); 1690 if (bs_sectors[bs_i] < 0) { 1691 error_report("Could not get size of %s: %s", 1692 argv[optind + bs_i], strerror(-bs_sectors[bs_i])); 1693 ret = -1; 1694 goto out; 1695 } 1696 total_sectors += bs_sectors[bs_i]; 1697 } 1698 1699 if (sn_opts) { 1700 ret = bdrv_snapshot_load_tmp(bs[0], 1701 qemu_opt_get(sn_opts, SNAPSHOT_OPT_ID), 1702 qemu_opt_get(sn_opts, SNAPSHOT_OPT_NAME), 1703 &local_err); 1704 } else if (snapshot_name != NULL) { 1705 if (bs_n > 1) { 1706 error_report("No support for concatenating multiple snapshot"); 1707 ret = -1; 1708 goto out; 1709 } 1710 1711 bdrv_snapshot_load_tmp_by_id_or_name(bs[0], snapshot_name, &local_err); 1712 } 1713 if (local_err) { 1714 error_report("Failed to load snapshot: %s", 1715 error_get_pretty(local_err)); 1716 error_free(local_err); 1717 ret = -1; 1718 goto out; 1719 } 1720 1721 /* Find driver and parse its options */ 1722 drv = bdrv_find_format(out_fmt); 1723 if (!drv) { 1724 error_report("Unknown file format '%s'", out_fmt); 1725 ret = -1; 1726 goto out; 1727 } 1728 1729 proto_drv = bdrv_find_protocol(out_filename, true, &local_err); 1730 if (!proto_drv) { 1731 error_report_err(local_err); 1732 ret = -1; 1733 goto out; 1734 } 1735 1736 if (!skip_create) { 1737 if (!drv->create_opts) { 1738 error_report("Format driver '%s' does not support image creation", 1739 drv->format_name); 1740 ret = -1; 1741 goto out; 1742 } 1743 1744 if (!proto_drv->create_opts) { 1745 error_report("Protocol driver '%s' does not support image creation", 1746 proto_drv->format_name); 1747 ret = -1; 1748 goto out; 1749 } 1750 1751 create_opts = qemu_opts_append(create_opts, drv->create_opts); 1752 create_opts = qemu_opts_append(create_opts, proto_drv->create_opts); 1753 1754 opts = qemu_opts_create(create_opts, NULL, 0, &error_abort); 1755 if (options) { 1756 qemu_opts_do_parse(opts, options, NULL, &local_err); 1757 if (local_err) { 1758 error_report_err(local_err); 1759 ret = -1; 1760 goto out; 1761 } 1762 } 1763 1764 qemu_opt_set_number(opts, BLOCK_OPT_SIZE, total_sectors * 512, 1765 &error_abort); 1766 ret = add_old_style_options(out_fmt, opts, out_baseimg, NULL); 1767 if (ret < 0) { 1768 goto out; 1769 } 1770 } 1771 1772 /* Get backing file name if -o backing_file was used */ 1773 out_baseimg_param = qemu_opt_get(opts, BLOCK_OPT_BACKING_FILE); 1774 if (out_baseimg_param) { 1775 out_baseimg = out_baseimg_param; 1776 } 1777 1778 /* Check if compression is supported */ 1779 if (compress) { 1780 bool encryption = 1781 qemu_opt_get_bool(opts, BLOCK_OPT_ENCRYPT, false); 1782 const char *preallocation = 1783 qemu_opt_get(opts, BLOCK_OPT_PREALLOC); 1784 1785 if (!drv->bdrv_write_compressed) { 1786 error_report("Compression not supported for this file format"); 1787 ret = -1; 1788 goto out; 1789 } 1790 1791 if (encryption) { 1792 error_report("Compression and encryption not supported at " 1793 "the same time"); 1794 ret = -1; 1795 goto out; 1796 } 1797 1798 if (preallocation 1799 && strcmp(preallocation, "off")) 1800 { 1801 error_report("Compression and preallocation not supported at " 1802 "the same time"); 1803 ret = -1; 1804 goto out; 1805 } 1806 } 1807 1808 if (!skip_create) { 1809 /* Create the new image */ 1810 ret = bdrv_create(drv, out_filename, opts, &local_err); 1811 if (ret < 0) { 1812 error_report("%s: error while converting %s: %s", 1813 out_filename, out_fmt, error_get_pretty(local_err)); 1814 error_free(local_err); 1815 goto out; 1816 } 1817 } 1818 1819 flags = min_sparse ? (BDRV_O_RDWR | BDRV_O_UNMAP) : BDRV_O_RDWR; 1820 ret = bdrv_parse_cache_flags(cache, &flags); 1821 if (ret < 0) { 1822 error_report("Invalid cache option: %s", cache); 1823 goto out; 1824 } 1825 1826 out_blk = img_open("target", out_filename, out_fmt, flags, true, quiet); 1827 if (!out_blk) { 1828 ret = -1; 1829 goto out; 1830 } 1831 out_bs = blk_bs(out_blk); 1832 1833 /* increase bufsectors from the default 4096 (2M) if opt_transfer_length 1834 * or discard_alignment of the out_bs is greater. Limit to 32768 (16MB) 1835 * as maximum. */ 1836 bufsectors = MIN(32768, 1837 MAX(bufsectors, MAX(out_bs->bl.opt_transfer_length, 1838 out_bs->bl.discard_alignment)) 1839 ); 1840 1841 if (skip_create) { 1842 int64_t output_sectors = blk_nb_sectors(out_blk); 1843 if (output_sectors < 0) { 1844 error_report("unable to get output image length: %s", 1845 strerror(-output_sectors)); 1846 ret = -1; 1847 goto out; 1848 } else if (output_sectors < total_sectors) { 1849 error_report("output file is smaller than input file"); 1850 ret = -1; 1851 goto out; 1852 } 1853 } 1854 1855 cluster_sectors = 0; 1856 ret = bdrv_get_info(out_bs, &bdi); 1857 if (ret < 0) { 1858 if (compress) { 1859 error_report("could not get block driver info"); 1860 goto out; 1861 } 1862 } else { 1863 compress = compress || bdi.needs_compressed_writes; 1864 cluster_sectors = bdi.cluster_size / BDRV_SECTOR_SIZE; 1865 } 1866 1867 state = (ImgConvertState) { 1868 .src = blk, 1869 .src_sectors = bs_sectors, 1870 .src_num = bs_n, 1871 .total_sectors = total_sectors, 1872 .target = out_blk, 1873 .compressed = compress, 1874 .target_has_backing = (bool) out_baseimg, 1875 .min_sparse = min_sparse, 1876 .cluster_sectors = cluster_sectors, 1877 .buf_sectors = bufsectors, 1878 }; 1879 ret = convert_do_copy(&state); 1880 1881 out: 1882 if (!ret) { 1883 qemu_progress_print(100, 0); 1884 } 1885 qemu_progress_end(); 1886 qemu_opts_del(opts); 1887 qemu_opts_free(create_opts); 1888 qemu_opts_del(sn_opts); 1889 blk_unref(out_blk); 1890 g_free(bs); 1891 if (blk) { 1892 for (bs_i = 0; bs_i < bs_n; bs_i++) { 1893 blk_unref(blk[bs_i]); 1894 } 1895 g_free(blk); 1896 } 1897 g_free(bs_sectors); 1898 fail_getopt: 1899 g_free(options); 1900 1901 if (ret) { 1902 return 1; 1903 } 1904 return 0; 1905 } 1906 1907 1908 static void dump_snapshots(BlockDriverState *bs) 1909 { 1910 QEMUSnapshotInfo *sn_tab, *sn; 1911 int nb_sns, i; 1912 1913 nb_sns = bdrv_snapshot_list(bs, &sn_tab); 1914 if (nb_sns <= 0) 1915 return; 1916 printf("Snapshot list:\n"); 1917 bdrv_snapshot_dump(fprintf, stdout, NULL); 1918 printf("\n"); 1919 for(i = 0; i < nb_sns; i++) { 1920 sn = &sn_tab[i]; 1921 bdrv_snapshot_dump(fprintf, stdout, sn); 1922 printf("\n"); 1923 } 1924 g_free(sn_tab); 1925 } 1926 1927 static void dump_json_image_info_list(ImageInfoList *list) 1928 { 1929 Error *local_err = NULL; 1930 QString *str; 1931 QmpOutputVisitor *ov = qmp_output_visitor_new(); 1932 QObject *obj; 1933 visit_type_ImageInfoList(qmp_output_get_visitor(ov), 1934 &list, NULL, &local_err); 1935 obj = qmp_output_get_qobject(ov); 1936 str = qobject_to_json_pretty(obj); 1937 assert(str != NULL); 1938 printf("%s\n", qstring_get_str(str)); 1939 qobject_decref(obj); 1940 qmp_output_visitor_cleanup(ov); 1941 QDECREF(str); 1942 } 1943 1944 static void dump_json_image_info(ImageInfo *info) 1945 { 1946 Error *local_err = NULL; 1947 QString *str; 1948 QmpOutputVisitor *ov = qmp_output_visitor_new(); 1949 QObject *obj; 1950 visit_type_ImageInfo(qmp_output_get_visitor(ov), 1951 &info, NULL, &local_err); 1952 obj = qmp_output_get_qobject(ov); 1953 str = qobject_to_json_pretty(obj); 1954 assert(str != NULL); 1955 printf("%s\n", qstring_get_str(str)); 1956 qobject_decref(obj); 1957 qmp_output_visitor_cleanup(ov); 1958 QDECREF(str); 1959 } 1960 1961 static void dump_human_image_info_list(ImageInfoList *list) 1962 { 1963 ImageInfoList *elem; 1964 bool delim = false; 1965 1966 for (elem = list; elem; elem = elem->next) { 1967 if (delim) { 1968 printf("\n"); 1969 } 1970 delim = true; 1971 1972 bdrv_image_info_dump(fprintf, stdout, elem->value); 1973 } 1974 } 1975 1976 static gboolean str_equal_func(gconstpointer a, gconstpointer b) 1977 { 1978 return strcmp(a, b) == 0; 1979 } 1980 1981 /** 1982 * Open an image file chain and return an ImageInfoList 1983 * 1984 * @filename: topmost image filename 1985 * @fmt: topmost image format (may be NULL to autodetect) 1986 * @chain: true - enumerate entire backing file chain 1987 * false - only topmost image file 1988 * 1989 * Returns a list of ImageInfo objects or NULL if there was an error opening an 1990 * image file. If there was an error a message will have been printed to 1991 * stderr. 1992 */ 1993 static ImageInfoList *collect_image_info_list(const char *filename, 1994 const char *fmt, 1995 bool chain) 1996 { 1997 ImageInfoList *head = NULL; 1998 ImageInfoList **last = &head; 1999 GHashTable *filenames; 2000 Error *err = NULL; 2001 2002 filenames = g_hash_table_new_full(g_str_hash, str_equal_func, NULL, NULL); 2003 2004 while (filename) { 2005 BlockBackend *blk; 2006 BlockDriverState *bs; 2007 ImageInfo *info; 2008 ImageInfoList *elem; 2009 2010 if (g_hash_table_lookup_extended(filenames, filename, NULL, NULL)) { 2011 error_report("Backing file '%s' creates an infinite loop.", 2012 filename); 2013 goto err; 2014 } 2015 g_hash_table_insert(filenames, (gpointer)filename, NULL); 2016 2017 blk = img_open("image", filename, fmt, 2018 BDRV_O_FLAGS | BDRV_O_NO_BACKING, false, false); 2019 if (!blk) { 2020 goto err; 2021 } 2022 bs = blk_bs(blk); 2023 2024 bdrv_query_image_info(bs, &info, &err); 2025 if (err) { 2026 error_report_err(err); 2027 blk_unref(blk); 2028 goto err; 2029 } 2030 2031 elem = g_new0(ImageInfoList, 1); 2032 elem->value = info; 2033 *last = elem; 2034 last = &elem->next; 2035 2036 blk_unref(blk); 2037 2038 filename = fmt = NULL; 2039 if (chain) { 2040 if (info->has_full_backing_filename) { 2041 filename = info->full_backing_filename; 2042 } else if (info->has_backing_filename) { 2043 filename = info->backing_filename; 2044 } 2045 if (info->has_backing_filename_format) { 2046 fmt = info->backing_filename_format; 2047 } 2048 } 2049 } 2050 g_hash_table_destroy(filenames); 2051 return head; 2052 2053 err: 2054 qapi_free_ImageInfoList(head); 2055 g_hash_table_destroy(filenames); 2056 return NULL; 2057 } 2058 2059 static int img_info(int argc, char **argv) 2060 { 2061 int c; 2062 OutputFormat output_format = OFORMAT_HUMAN; 2063 bool chain = false; 2064 const char *filename, *fmt, *output; 2065 ImageInfoList *list; 2066 2067 fmt = NULL; 2068 output = NULL; 2069 for(;;) { 2070 int option_index = 0; 2071 static const struct option long_options[] = { 2072 {"help", no_argument, 0, 'h'}, 2073 {"format", required_argument, 0, 'f'}, 2074 {"output", required_argument, 0, OPTION_OUTPUT}, 2075 {"backing-chain", no_argument, 0, OPTION_BACKING_CHAIN}, 2076 {0, 0, 0, 0} 2077 }; 2078 c = getopt_long(argc, argv, "f:h", 2079 long_options, &option_index); 2080 if (c == -1) { 2081 break; 2082 } 2083 switch(c) { 2084 case '?': 2085 case 'h': 2086 help(); 2087 break; 2088 case 'f': 2089 fmt = optarg; 2090 break; 2091 case OPTION_OUTPUT: 2092 output = optarg; 2093 break; 2094 case OPTION_BACKING_CHAIN: 2095 chain = true; 2096 break; 2097 } 2098 } 2099 if (optind != argc - 1) { 2100 error_exit("Expecting one image file name"); 2101 } 2102 filename = argv[optind++]; 2103 2104 if (output && !strcmp(output, "json")) { 2105 output_format = OFORMAT_JSON; 2106 } else if (output && !strcmp(output, "human")) { 2107 output_format = OFORMAT_HUMAN; 2108 } else if (output) { 2109 error_report("--output must be used with human or json as argument."); 2110 return 1; 2111 } 2112 2113 list = collect_image_info_list(filename, fmt, chain); 2114 if (!list) { 2115 return 1; 2116 } 2117 2118 switch (output_format) { 2119 case OFORMAT_HUMAN: 2120 dump_human_image_info_list(list); 2121 break; 2122 case OFORMAT_JSON: 2123 if (chain) { 2124 dump_json_image_info_list(list); 2125 } else { 2126 dump_json_image_info(list->value); 2127 } 2128 break; 2129 } 2130 2131 qapi_free_ImageInfoList(list); 2132 return 0; 2133 } 2134 2135 2136 typedef struct MapEntry { 2137 int flags; 2138 int depth; 2139 int64_t start; 2140 int64_t length; 2141 int64_t offset; 2142 BlockDriverState *bs; 2143 } MapEntry; 2144 2145 static void dump_map_entry(OutputFormat output_format, MapEntry *e, 2146 MapEntry *next) 2147 { 2148 switch (output_format) { 2149 case OFORMAT_HUMAN: 2150 if ((e->flags & BDRV_BLOCK_DATA) && 2151 !(e->flags & BDRV_BLOCK_OFFSET_VALID)) { 2152 error_report("File contains external, encrypted or compressed clusters."); 2153 exit(1); 2154 } 2155 if ((e->flags & (BDRV_BLOCK_DATA|BDRV_BLOCK_ZERO)) == BDRV_BLOCK_DATA) { 2156 printf("%#-16"PRIx64"%#-16"PRIx64"%#-16"PRIx64"%s\n", 2157 e->start, e->length, e->offset, e->bs->filename); 2158 } 2159 /* This format ignores the distinction between 0, ZERO and ZERO|DATA. 2160 * Modify the flags here to allow more coalescing. 2161 */ 2162 if (next && 2163 (next->flags & (BDRV_BLOCK_DATA|BDRV_BLOCK_ZERO)) != BDRV_BLOCK_DATA) { 2164 next->flags &= ~BDRV_BLOCK_DATA; 2165 next->flags |= BDRV_BLOCK_ZERO; 2166 } 2167 break; 2168 case OFORMAT_JSON: 2169 printf("%s{ \"start\": %"PRId64", \"length\": %"PRId64", \"depth\": %d," 2170 " \"zero\": %s, \"data\": %s", 2171 (e->start == 0 ? "[" : ",\n"), 2172 e->start, e->length, e->depth, 2173 (e->flags & BDRV_BLOCK_ZERO) ? "true" : "false", 2174 (e->flags & BDRV_BLOCK_DATA) ? "true" : "false"); 2175 if (e->flags & BDRV_BLOCK_OFFSET_VALID) { 2176 printf(", \"offset\": %"PRId64"", e->offset); 2177 } 2178 putchar('}'); 2179 2180 if (!next) { 2181 printf("]\n"); 2182 } 2183 break; 2184 } 2185 } 2186 2187 static int get_block_status(BlockDriverState *bs, int64_t sector_num, 2188 int nb_sectors, MapEntry *e) 2189 { 2190 int64_t ret; 2191 int depth; 2192 2193 /* As an optimization, we could cache the current range of unallocated 2194 * clusters in each file of the chain, and avoid querying the same 2195 * range repeatedly. 2196 */ 2197 2198 depth = 0; 2199 for (;;) { 2200 ret = bdrv_get_block_status(bs, sector_num, nb_sectors, &nb_sectors); 2201 if (ret < 0) { 2202 return ret; 2203 } 2204 assert(nb_sectors); 2205 if (ret & (BDRV_BLOCK_ZERO|BDRV_BLOCK_DATA)) { 2206 break; 2207 } 2208 bs = bs->backing_hd; 2209 if (bs == NULL) { 2210 ret = 0; 2211 break; 2212 } 2213 2214 depth++; 2215 } 2216 2217 e->start = sector_num * BDRV_SECTOR_SIZE; 2218 e->length = nb_sectors * BDRV_SECTOR_SIZE; 2219 e->flags = ret & ~BDRV_BLOCK_OFFSET_MASK; 2220 e->offset = ret & BDRV_BLOCK_OFFSET_MASK; 2221 e->depth = depth; 2222 e->bs = bs; 2223 return 0; 2224 } 2225 2226 static int img_map(int argc, char **argv) 2227 { 2228 int c; 2229 OutputFormat output_format = OFORMAT_HUMAN; 2230 BlockBackend *blk; 2231 BlockDriverState *bs; 2232 const char *filename, *fmt, *output; 2233 int64_t length; 2234 MapEntry curr = { .length = 0 }, next; 2235 int ret = 0; 2236 2237 fmt = NULL; 2238 output = NULL; 2239 for (;;) { 2240 int option_index = 0; 2241 static const struct option long_options[] = { 2242 {"help", no_argument, 0, 'h'}, 2243 {"format", required_argument, 0, 'f'}, 2244 {"output", required_argument, 0, OPTION_OUTPUT}, 2245 {0, 0, 0, 0} 2246 }; 2247 c = getopt_long(argc, argv, "f:h", 2248 long_options, &option_index); 2249 if (c == -1) { 2250 break; 2251 } 2252 switch (c) { 2253 case '?': 2254 case 'h': 2255 help(); 2256 break; 2257 case 'f': 2258 fmt = optarg; 2259 break; 2260 case OPTION_OUTPUT: 2261 output = optarg; 2262 break; 2263 } 2264 } 2265 if (optind != argc - 1) { 2266 error_exit("Expecting one image file name"); 2267 } 2268 filename = argv[optind]; 2269 2270 if (output && !strcmp(output, "json")) { 2271 output_format = OFORMAT_JSON; 2272 } else if (output && !strcmp(output, "human")) { 2273 output_format = OFORMAT_HUMAN; 2274 } else if (output) { 2275 error_report("--output must be used with human or json as argument."); 2276 return 1; 2277 } 2278 2279 blk = img_open("image", filename, fmt, BDRV_O_FLAGS, true, false); 2280 if (!blk) { 2281 return 1; 2282 } 2283 bs = blk_bs(blk); 2284 2285 if (output_format == OFORMAT_HUMAN) { 2286 printf("%-16s%-16s%-16s%s\n", "Offset", "Length", "Mapped to", "File"); 2287 } 2288 2289 length = blk_getlength(blk); 2290 while (curr.start + curr.length < length) { 2291 int64_t nsectors_left; 2292 int64_t sector_num; 2293 int n; 2294 2295 sector_num = (curr.start + curr.length) >> BDRV_SECTOR_BITS; 2296 2297 /* Probe up to 1 GiB at a time. */ 2298 nsectors_left = DIV_ROUND_UP(length, BDRV_SECTOR_SIZE) - sector_num; 2299 n = MIN(1 << (30 - BDRV_SECTOR_BITS), nsectors_left); 2300 ret = get_block_status(bs, sector_num, n, &next); 2301 2302 if (ret < 0) { 2303 error_report("Could not read file metadata: %s", strerror(-ret)); 2304 goto out; 2305 } 2306 2307 if (curr.length != 0 && curr.flags == next.flags && 2308 curr.depth == next.depth && 2309 ((curr.flags & BDRV_BLOCK_OFFSET_VALID) == 0 || 2310 curr.offset + curr.length == next.offset)) { 2311 curr.length += next.length; 2312 continue; 2313 } 2314 2315 if (curr.length > 0) { 2316 dump_map_entry(output_format, &curr, &next); 2317 } 2318 curr = next; 2319 } 2320 2321 dump_map_entry(output_format, &curr, NULL); 2322 2323 out: 2324 blk_unref(blk); 2325 return ret < 0; 2326 } 2327 2328 #define SNAPSHOT_LIST 1 2329 #define SNAPSHOT_CREATE 2 2330 #define SNAPSHOT_APPLY 3 2331 #define SNAPSHOT_DELETE 4 2332 2333 static int img_snapshot(int argc, char **argv) 2334 { 2335 BlockBackend *blk; 2336 BlockDriverState *bs; 2337 QEMUSnapshotInfo sn; 2338 char *filename, *snapshot_name = NULL; 2339 int c, ret = 0, bdrv_oflags; 2340 int action = 0; 2341 qemu_timeval tv; 2342 bool quiet = false; 2343 Error *err = NULL; 2344 2345 bdrv_oflags = BDRV_O_FLAGS | BDRV_O_RDWR; 2346 /* Parse commandline parameters */ 2347 for(;;) { 2348 c = getopt(argc, argv, "la:c:d:hq"); 2349 if (c == -1) { 2350 break; 2351 } 2352 switch(c) { 2353 case '?': 2354 case 'h': 2355 help(); 2356 return 0; 2357 case 'l': 2358 if (action) { 2359 error_exit("Cannot mix '-l', '-a', '-c', '-d'"); 2360 return 0; 2361 } 2362 action = SNAPSHOT_LIST; 2363 bdrv_oflags &= ~BDRV_O_RDWR; /* no need for RW */ 2364 break; 2365 case 'a': 2366 if (action) { 2367 error_exit("Cannot mix '-l', '-a', '-c', '-d'"); 2368 return 0; 2369 } 2370 action = SNAPSHOT_APPLY; 2371 snapshot_name = optarg; 2372 break; 2373 case 'c': 2374 if (action) { 2375 error_exit("Cannot mix '-l', '-a', '-c', '-d'"); 2376 return 0; 2377 } 2378 action = SNAPSHOT_CREATE; 2379 snapshot_name = optarg; 2380 break; 2381 case 'd': 2382 if (action) { 2383 error_exit("Cannot mix '-l', '-a', '-c', '-d'"); 2384 return 0; 2385 } 2386 action = SNAPSHOT_DELETE; 2387 snapshot_name = optarg; 2388 break; 2389 case 'q': 2390 quiet = true; 2391 break; 2392 } 2393 } 2394 2395 if (optind != argc - 1) { 2396 error_exit("Expecting one image file name"); 2397 } 2398 filename = argv[optind++]; 2399 2400 /* Open the image */ 2401 blk = img_open("image", filename, NULL, bdrv_oflags, true, quiet); 2402 if (!blk) { 2403 return 1; 2404 } 2405 bs = blk_bs(blk); 2406 2407 /* Perform the requested action */ 2408 switch(action) { 2409 case SNAPSHOT_LIST: 2410 dump_snapshots(bs); 2411 break; 2412 2413 case SNAPSHOT_CREATE: 2414 memset(&sn, 0, sizeof(sn)); 2415 pstrcpy(sn.name, sizeof(sn.name), snapshot_name); 2416 2417 qemu_gettimeofday(&tv); 2418 sn.date_sec = tv.tv_sec; 2419 sn.date_nsec = tv.tv_usec * 1000; 2420 2421 ret = bdrv_snapshot_create(bs, &sn); 2422 if (ret) { 2423 error_report("Could not create snapshot '%s': %d (%s)", 2424 snapshot_name, ret, strerror(-ret)); 2425 } 2426 break; 2427 2428 case SNAPSHOT_APPLY: 2429 ret = bdrv_snapshot_goto(bs, snapshot_name); 2430 if (ret) { 2431 error_report("Could not apply snapshot '%s': %d (%s)", 2432 snapshot_name, ret, strerror(-ret)); 2433 } 2434 break; 2435 2436 case SNAPSHOT_DELETE: 2437 bdrv_snapshot_delete_by_id_or_name(bs, snapshot_name, &err); 2438 if (err) { 2439 error_report("Could not delete snapshot '%s': (%s)", 2440 snapshot_name, error_get_pretty(err)); 2441 error_free(err); 2442 ret = 1; 2443 } 2444 break; 2445 } 2446 2447 /* Cleanup */ 2448 blk_unref(blk); 2449 if (ret) { 2450 return 1; 2451 } 2452 return 0; 2453 } 2454 2455 static int img_rebase(int argc, char **argv) 2456 { 2457 BlockBackend *blk = NULL, *blk_old_backing = NULL, *blk_new_backing = NULL; 2458 BlockDriverState *bs = NULL; 2459 char *filename; 2460 const char *fmt, *cache, *src_cache, *out_basefmt, *out_baseimg; 2461 int c, flags, src_flags, ret; 2462 int unsafe = 0; 2463 int progress = 0; 2464 bool quiet = false; 2465 Error *local_err = NULL; 2466 2467 /* Parse commandline parameters */ 2468 fmt = NULL; 2469 cache = BDRV_DEFAULT_CACHE; 2470 src_cache = BDRV_DEFAULT_CACHE; 2471 out_baseimg = NULL; 2472 out_basefmt = NULL; 2473 for(;;) { 2474 c = getopt(argc, argv, "hf:F:b:upt:T:q"); 2475 if (c == -1) { 2476 break; 2477 } 2478 switch(c) { 2479 case '?': 2480 case 'h': 2481 help(); 2482 return 0; 2483 case 'f': 2484 fmt = optarg; 2485 break; 2486 case 'F': 2487 out_basefmt = optarg; 2488 break; 2489 case 'b': 2490 out_baseimg = optarg; 2491 break; 2492 case 'u': 2493 unsafe = 1; 2494 break; 2495 case 'p': 2496 progress = 1; 2497 break; 2498 case 't': 2499 cache = optarg; 2500 break; 2501 case 'T': 2502 src_cache = optarg; 2503 break; 2504 case 'q': 2505 quiet = true; 2506 break; 2507 } 2508 } 2509 2510 if (quiet) { 2511 progress = 0; 2512 } 2513 2514 if (optind != argc - 1) { 2515 error_exit("Expecting one image file name"); 2516 } 2517 if (!unsafe && !out_baseimg) { 2518 error_exit("Must specify backing file (-b) or use unsafe mode (-u)"); 2519 } 2520 filename = argv[optind++]; 2521 2522 qemu_progress_init(progress, 2.0); 2523 qemu_progress_print(0, 100); 2524 2525 flags = BDRV_O_RDWR | (unsafe ? BDRV_O_NO_BACKING : 0); 2526 ret = bdrv_parse_cache_flags(cache, &flags); 2527 if (ret < 0) { 2528 error_report("Invalid cache option: %s", cache); 2529 goto out; 2530 } 2531 2532 src_flags = BDRV_O_FLAGS; 2533 ret = bdrv_parse_cache_flags(src_cache, &src_flags); 2534 if (ret < 0) { 2535 error_report("Invalid source cache option: %s", src_cache); 2536 goto out; 2537 } 2538 2539 /* 2540 * Open the images. 2541 * 2542 * Ignore the old backing file for unsafe rebase in case we want to correct 2543 * the reference to a renamed or moved backing file. 2544 */ 2545 blk = img_open("image", filename, fmt, flags, true, quiet); 2546 if (!blk) { 2547 ret = -1; 2548 goto out; 2549 } 2550 bs = blk_bs(blk); 2551 2552 if (out_basefmt != NULL) { 2553 if (bdrv_find_format(out_basefmt) == NULL) { 2554 error_report("Invalid format name: '%s'", out_basefmt); 2555 ret = -1; 2556 goto out; 2557 } 2558 } 2559 2560 /* For safe rebasing we need to compare old and new backing file */ 2561 if (!unsafe) { 2562 char backing_name[PATH_MAX]; 2563 QDict *options = NULL; 2564 2565 if (bs->backing_format[0] != '\0') { 2566 options = qdict_new(); 2567 qdict_put(options, "driver", qstring_from_str(bs->backing_format)); 2568 } 2569 2570 bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name)); 2571 blk_old_backing = blk_new_open("old_backing", backing_name, NULL, 2572 options, src_flags, &local_err); 2573 if (!blk_old_backing) { 2574 error_report("Could not open old backing file '%s': %s", 2575 backing_name, error_get_pretty(local_err)); 2576 error_free(local_err); 2577 goto out; 2578 } 2579 2580 if (out_baseimg[0]) { 2581 if (out_basefmt) { 2582 options = qdict_new(); 2583 qdict_put(options, "driver", qstring_from_str(out_basefmt)); 2584 } else { 2585 options = NULL; 2586 } 2587 2588 blk_new_backing = blk_new_open("new_backing", out_baseimg, NULL, 2589 options, src_flags, &local_err); 2590 if (!blk_new_backing) { 2591 error_report("Could not open new backing file '%s': %s", 2592 out_baseimg, error_get_pretty(local_err)); 2593 error_free(local_err); 2594 goto out; 2595 } 2596 } 2597 } 2598 2599 /* 2600 * Check each unallocated cluster in the COW file. If it is unallocated, 2601 * accesses go to the backing file. We must therefore compare this cluster 2602 * in the old and new backing file, and if they differ we need to copy it 2603 * from the old backing file into the COW file. 2604 * 2605 * If qemu-img crashes during this step, no harm is done. The content of 2606 * the image is the same as the original one at any time. 2607 */ 2608 if (!unsafe) { 2609 int64_t num_sectors; 2610 int64_t old_backing_num_sectors; 2611 int64_t new_backing_num_sectors = 0; 2612 uint64_t sector; 2613 int n; 2614 uint8_t * buf_old; 2615 uint8_t * buf_new; 2616 float local_progress = 0; 2617 2618 buf_old = blk_blockalign(blk, IO_BUF_SIZE); 2619 buf_new = blk_blockalign(blk, IO_BUF_SIZE); 2620 2621 num_sectors = blk_nb_sectors(blk); 2622 if (num_sectors < 0) { 2623 error_report("Could not get size of '%s': %s", 2624 filename, strerror(-num_sectors)); 2625 ret = -1; 2626 goto out; 2627 } 2628 old_backing_num_sectors = blk_nb_sectors(blk_old_backing); 2629 if (old_backing_num_sectors < 0) { 2630 char backing_name[PATH_MAX]; 2631 2632 bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name)); 2633 error_report("Could not get size of '%s': %s", 2634 backing_name, strerror(-old_backing_num_sectors)); 2635 ret = -1; 2636 goto out; 2637 } 2638 if (blk_new_backing) { 2639 new_backing_num_sectors = blk_nb_sectors(blk_new_backing); 2640 if (new_backing_num_sectors < 0) { 2641 error_report("Could not get size of '%s': %s", 2642 out_baseimg, strerror(-new_backing_num_sectors)); 2643 ret = -1; 2644 goto out; 2645 } 2646 } 2647 2648 if (num_sectors != 0) { 2649 local_progress = (float)100 / 2650 (num_sectors / MIN(num_sectors, IO_BUF_SIZE / 512)); 2651 } 2652 2653 for (sector = 0; sector < num_sectors; sector += n) { 2654 2655 /* How many sectors can we handle with the next read? */ 2656 if (sector + (IO_BUF_SIZE / 512) <= num_sectors) { 2657 n = (IO_BUF_SIZE / 512); 2658 } else { 2659 n = num_sectors - sector; 2660 } 2661 2662 /* If the cluster is allocated, we don't need to take action */ 2663 ret = bdrv_is_allocated(bs, sector, n, &n); 2664 if (ret < 0) { 2665 error_report("error while reading image metadata: %s", 2666 strerror(-ret)); 2667 goto out; 2668 } 2669 if (ret) { 2670 continue; 2671 } 2672 2673 /* 2674 * Read old and new backing file and take into consideration that 2675 * backing files may be smaller than the COW image. 2676 */ 2677 if (sector >= old_backing_num_sectors) { 2678 memset(buf_old, 0, n * BDRV_SECTOR_SIZE); 2679 } else { 2680 if (sector + n > old_backing_num_sectors) { 2681 n = old_backing_num_sectors - sector; 2682 } 2683 2684 ret = blk_read(blk_old_backing, sector, buf_old, n); 2685 if (ret < 0) { 2686 error_report("error while reading from old backing file"); 2687 goto out; 2688 } 2689 } 2690 2691 if (sector >= new_backing_num_sectors || !blk_new_backing) { 2692 memset(buf_new, 0, n * BDRV_SECTOR_SIZE); 2693 } else { 2694 if (sector + n > new_backing_num_sectors) { 2695 n = new_backing_num_sectors - sector; 2696 } 2697 2698 ret = blk_read(blk_new_backing, sector, buf_new, n); 2699 if (ret < 0) { 2700 error_report("error while reading from new backing file"); 2701 goto out; 2702 } 2703 } 2704 2705 /* If they differ, we need to write to the COW file */ 2706 uint64_t written = 0; 2707 2708 while (written < n) { 2709 int pnum; 2710 2711 if (compare_sectors(buf_old + written * 512, 2712 buf_new + written * 512, n - written, &pnum)) 2713 { 2714 ret = blk_write(blk, sector + written, 2715 buf_old + written * 512, pnum); 2716 if (ret < 0) { 2717 error_report("Error while writing to COW image: %s", 2718 strerror(-ret)); 2719 goto out; 2720 } 2721 } 2722 2723 written += pnum; 2724 } 2725 qemu_progress_print(local_progress, 100); 2726 } 2727 2728 qemu_vfree(buf_old); 2729 qemu_vfree(buf_new); 2730 } 2731 2732 /* 2733 * Change the backing file. All clusters that are different from the old 2734 * backing file are overwritten in the COW file now, so the visible content 2735 * doesn't change when we switch the backing file. 2736 */ 2737 if (out_baseimg && *out_baseimg) { 2738 ret = bdrv_change_backing_file(bs, out_baseimg, out_basefmt); 2739 } else { 2740 ret = bdrv_change_backing_file(bs, NULL, NULL); 2741 } 2742 2743 if (ret == -ENOSPC) { 2744 error_report("Could not change the backing file to '%s': No " 2745 "space left in the file header", out_baseimg); 2746 } else if (ret < 0) { 2747 error_report("Could not change the backing file to '%s': %s", 2748 out_baseimg, strerror(-ret)); 2749 } 2750 2751 qemu_progress_print(100, 0); 2752 /* 2753 * TODO At this point it is possible to check if any clusters that are 2754 * allocated in the COW file are the same in the backing file. If so, they 2755 * could be dropped from the COW file. Don't do this before switching the 2756 * backing file, in case of a crash this would lead to corruption. 2757 */ 2758 out: 2759 qemu_progress_end(); 2760 /* Cleanup */ 2761 if (!unsafe) { 2762 blk_unref(blk_old_backing); 2763 blk_unref(blk_new_backing); 2764 } 2765 2766 blk_unref(blk); 2767 if (ret) { 2768 return 1; 2769 } 2770 return 0; 2771 } 2772 2773 static int img_resize(int argc, char **argv) 2774 { 2775 Error *err = NULL; 2776 int c, ret, relative; 2777 const char *filename, *fmt, *size; 2778 int64_t n, total_size; 2779 bool quiet = false; 2780 BlockBackend *blk = NULL; 2781 QemuOpts *param; 2782 static QemuOptsList resize_options = { 2783 .name = "resize_options", 2784 .head = QTAILQ_HEAD_INITIALIZER(resize_options.head), 2785 .desc = { 2786 { 2787 .name = BLOCK_OPT_SIZE, 2788 .type = QEMU_OPT_SIZE, 2789 .help = "Virtual disk size" 2790 }, { 2791 /* end of list */ 2792 } 2793 }, 2794 }; 2795 2796 /* Remove size from argv manually so that negative numbers are not treated 2797 * as options by getopt. */ 2798 if (argc < 3) { 2799 error_exit("Not enough arguments"); 2800 return 1; 2801 } 2802 2803 size = argv[--argc]; 2804 2805 /* Parse getopt arguments */ 2806 fmt = NULL; 2807 for(;;) { 2808 c = getopt(argc, argv, "f:hq"); 2809 if (c == -1) { 2810 break; 2811 } 2812 switch(c) { 2813 case '?': 2814 case 'h': 2815 help(); 2816 break; 2817 case 'f': 2818 fmt = optarg; 2819 break; 2820 case 'q': 2821 quiet = true; 2822 break; 2823 } 2824 } 2825 if (optind != argc - 1) { 2826 error_exit("Expecting one image file name"); 2827 } 2828 filename = argv[optind++]; 2829 2830 /* Choose grow, shrink, or absolute resize mode */ 2831 switch (size[0]) { 2832 case '+': 2833 relative = 1; 2834 size++; 2835 break; 2836 case '-': 2837 relative = -1; 2838 size++; 2839 break; 2840 default: 2841 relative = 0; 2842 break; 2843 } 2844 2845 /* Parse size */ 2846 param = qemu_opts_create(&resize_options, NULL, 0, &error_abort); 2847 qemu_opt_set(param, BLOCK_OPT_SIZE, size, &err); 2848 if (err) { 2849 error_report_err(err); 2850 ret = -1; 2851 qemu_opts_del(param); 2852 goto out; 2853 } 2854 n = qemu_opt_get_size(param, BLOCK_OPT_SIZE, 0); 2855 qemu_opts_del(param); 2856 2857 blk = img_open("image", filename, fmt, BDRV_O_FLAGS | BDRV_O_RDWR, 2858 true, quiet); 2859 if (!blk) { 2860 ret = -1; 2861 goto out; 2862 } 2863 2864 if (relative) { 2865 total_size = blk_getlength(blk) + n * relative; 2866 } else { 2867 total_size = n; 2868 } 2869 if (total_size <= 0) { 2870 error_report("New image size must be positive"); 2871 ret = -1; 2872 goto out; 2873 } 2874 2875 ret = blk_truncate(blk, total_size); 2876 switch (ret) { 2877 case 0: 2878 qprintf(quiet, "Image resized.\n"); 2879 break; 2880 case -ENOTSUP: 2881 error_report("This image does not support resize"); 2882 break; 2883 case -EACCES: 2884 error_report("Image is read-only"); 2885 break; 2886 default: 2887 error_report("Error resizing image (%d)", -ret); 2888 break; 2889 } 2890 out: 2891 blk_unref(blk); 2892 if (ret) { 2893 return 1; 2894 } 2895 return 0; 2896 } 2897 2898 static void amend_status_cb(BlockDriverState *bs, 2899 int64_t offset, int64_t total_work_size) 2900 { 2901 qemu_progress_print(100.f * offset / total_work_size, 0); 2902 } 2903 2904 static int img_amend(int argc, char **argv) 2905 { 2906 Error *err = NULL; 2907 int c, ret = 0; 2908 char *options = NULL; 2909 QemuOptsList *create_opts = NULL; 2910 QemuOpts *opts = NULL; 2911 const char *fmt = NULL, *filename, *cache; 2912 int flags; 2913 bool quiet = false, progress = false; 2914 BlockBackend *blk = NULL; 2915 BlockDriverState *bs = NULL; 2916 2917 cache = BDRV_DEFAULT_CACHE; 2918 for (;;) { 2919 c = getopt(argc, argv, "ho:f:t:pq"); 2920 if (c == -1) { 2921 break; 2922 } 2923 2924 switch (c) { 2925 case 'h': 2926 case '?': 2927 help(); 2928 break; 2929 case 'o': 2930 if (!is_valid_option_list(optarg)) { 2931 error_report("Invalid option list: %s", optarg); 2932 ret = -1; 2933 goto out; 2934 } 2935 if (!options) { 2936 options = g_strdup(optarg); 2937 } else { 2938 char *old_options = options; 2939 options = g_strdup_printf("%s,%s", options, optarg); 2940 g_free(old_options); 2941 } 2942 break; 2943 case 'f': 2944 fmt = optarg; 2945 break; 2946 case 't': 2947 cache = optarg; 2948 break; 2949 case 'p': 2950 progress = true; 2951 break; 2952 case 'q': 2953 quiet = true; 2954 break; 2955 } 2956 } 2957 2958 if (!options) { 2959 error_exit("Must specify options (-o)"); 2960 } 2961 2962 if (quiet) { 2963 progress = false; 2964 } 2965 qemu_progress_init(progress, 1.0); 2966 2967 filename = (optind == argc - 1) ? argv[argc - 1] : NULL; 2968 if (fmt && has_help_option(options)) { 2969 /* If a format is explicitly specified (and possibly no filename is 2970 * given), print option help here */ 2971 ret = print_block_option_help(filename, fmt); 2972 goto out; 2973 } 2974 2975 if (optind != argc - 1) { 2976 error_report("Expecting one image file name"); 2977 ret = -1; 2978 goto out; 2979 } 2980 2981 flags = BDRV_O_FLAGS | BDRV_O_RDWR; 2982 ret = bdrv_parse_cache_flags(cache, &flags); 2983 if (ret < 0) { 2984 error_report("Invalid cache option: %s", cache); 2985 goto out; 2986 } 2987 2988 blk = img_open("image", filename, fmt, flags, true, quiet); 2989 if (!blk) { 2990 ret = -1; 2991 goto out; 2992 } 2993 bs = blk_bs(blk); 2994 2995 fmt = bs->drv->format_name; 2996 2997 if (has_help_option(options)) { 2998 /* If the format was auto-detected, print option help here */ 2999 ret = print_block_option_help(filename, fmt); 3000 goto out; 3001 } 3002 3003 if (!bs->drv->create_opts) { 3004 error_report("Format driver '%s' does not support any options to amend", 3005 fmt); 3006 ret = -1; 3007 goto out; 3008 } 3009 3010 create_opts = qemu_opts_append(create_opts, bs->drv->create_opts); 3011 opts = qemu_opts_create(create_opts, NULL, 0, &error_abort); 3012 if (options) { 3013 qemu_opts_do_parse(opts, options, NULL, &err); 3014 if (err) { 3015 error_report_err(err); 3016 ret = -1; 3017 goto out; 3018 } 3019 } 3020 3021 /* In case the driver does not call amend_status_cb() */ 3022 qemu_progress_print(0.f, 0); 3023 ret = bdrv_amend_options(bs, opts, &amend_status_cb); 3024 qemu_progress_print(100.f, 0); 3025 if (ret < 0) { 3026 error_report("Error while amending options: %s", strerror(-ret)); 3027 goto out; 3028 } 3029 3030 out: 3031 qemu_progress_end(); 3032 3033 blk_unref(blk); 3034 qemu_opts_del(opts); 3035 qemu_opts_free(create_opts); 3036 g_free(options); 3037 3038 if (ret) { 3039 return 1; 3040 } 3041 return 0; 3042 } 3043 3044 static const img_cmd_t img_cmds[] = { 3045 #define DEF(option, callback, arg_string) \ 3046 { option, callback }, 3047 #include "qemu-img-cmds.h" 3048 #undef DEF 3049 #undef GEN_DOCS 3050 { NULL, NULL, }, 3051 }; 3052 3053 int main(int argc, char **argv) 3054 { 3055 const img_cmd_t *cmd; 3056 const char *cmdname; 3057 Error *local_error = NULL; 3058 int c; 3059 static const struct option long_options[] = { 3060 {"help", no_argument, 0, 'h'}, 3061 {"version", no_argument, 0, 'v'}, 3062 {0, 0, 0, 0} 3063 }; 3064 3065 #ifdef CONFIG_POSIX 3066 signal(SIGPIPE, SIG_IGN); 3067 #endif 3068 3069 error_set_progname(argv[0]); 3070 qemu_init_exec_dir(argv[0]); 3071 3072 if (qemu_init_main_loop(&local_error)) { 3073 error_report_err(local_error); 3074 exit(EXIT_FAILURE); 3075 } 3076 3077 bdrv_init(); 3078 if (argc < 2) { 3079 error_exit("Not enough arguments"); 3080 } 3081 cmdname = argv[1]; 3082 3083 /* find the command */ 3084 for (cmd = img_cmds; cmd->name != NULL; cmd++) { 3085 if (!strcmp(cmdname, cmd->name)) { 3086 return cmd->handler(argc - 1, argv + 1); 3087 } 3088 } 3089 3090 c = getopt_long(argc, argv, "h", long_options, NULL); 3091 3092 if (c == 'h') { 3093 help(); 3094 } 3095 if (c == 'v') { 3096 printf(QEMU_IMG_VERSION); 3097 return 0; 3098 } 3099 3100 /* not found */ 3101 error_exit("Command not found: %s", cmdname); 3102 } 3103